#!/bin/bash
###########################################################################################
#
# 		This script checks for the required Debian packages are installed
# 		to build OpenCV.
# Commandline parameters:
# $@ - These are the names of the packages to check with 'dpkg'
#
# Returns:
#   0 - All packages installed (success)
#   1 - One or more packages missing (failure)
#
#   Kerry Billingham <contact (at) avionicengineers (d0t) com>
#   20 April 2016
#
###########################################################################################
red=$'\e[1;31m'
green=$'\e[1;32m'
end=$'\e[0m'
check_message="Checking for 'dpkg'"
dpkg -? &>/dev/null
if [ $? -ne 0 ]; then
    printf "%-80s%s\n" "${check_message}" "${red} MISSING.${end}"
    exit 1
else
    printf "%-80s%s\n" "${check_message}" "${green} INSTALLED.${end}"
fi

declare -i packageMissing=0
packageArray=( "$@" )
for package in ${packageArray[@]}; do
    check_message="Checking for package ${package}"
    dpkg -s ${package} &>/dev/null
    if [ $? -ne 0 ]; then
        printf "%-80s%s\n" "${check_message}" "${red} MISSING.${end}"
        packageMissing=1
    else
        printf "%-80s%s\n" "${check_message}" "${green} INSTALLED.${end}"
    fi
done

exit $packageMissing
